Scene loads before the canvas, which results in seeing what in the scene before the canvas appears.

To reproduce:
1. Open users attached project "CanvasDelayedLoading.zip"
2. Build for iOS
3. Deploy the project through Xcode to iOS device
4. Observe as for about a second you can see an empty scene before canvas appear

Expected result: canvas is loaded together with a scene
Actual result: canvas is loaded about a second later than a scene

Reproduced on:
2018.2.0a1 2018.2.0f2 2018.2.6f1 2018.3.0a11

Not reproduced on:
2018.1.9f2
MacOS Standalone
Android device

Device reproduced on:
iPhone 8 Plus iOS 11.0
iPhone 7 Plus iOS 11.1.1